Generally speaking, how much damage do you do to your hair? On a scale of 1 to 10—one being the least amount of damage and 10 being the most—how much do you think your hair goes through on a monthly ...

Olaplex is known for its bestselling No. 3 Hair Perfector, but over the years the brand has added to its line to create a comprehensive haircare ‘system’ that works for all hair types. Most recently, ...